Fan



FIG. 1 is a front perspective view of the fan;

FIG. 2 is a side elevational view of the fan;

FIG. 3 is an alternate side elevational view of the fan;

FIG. 4 is a top plan view of the fan; and,

FIG. 5 is a bottom plan view of the fan.

The ornamental design for a fan, as shown and described.